Prolific fella, Robert Pollard. With and without his now-defunct band Guided by Voices, the dude’s released a dizzying amount of music over the past 20 years. Now comes Suitcase 2: American Superdream Wow, yet another four-disc set of GBV arcana with a full 100 — count ’em!— songs and fragments for the delectation of true believers. If you’re not a rabid fan, however, these too-coy-for-comfort exercises in lo-fi songcraft will likely leave you mulling the differences between profundity and fecundity.